I transferred my blue lobster from a 30 gallon community tank to an unpopulated 10 gallon tank 2 nights ago. Last night, I put some feeder fish in the 10 to give the lobster something to do. Instead he ignored them, even when they swam in his face. This morning, no lobster in the tank. The filter lid had fallen in to the tank. I suspect the lobster went up the filter pipe, onto the top of the filter, and jumped. Anyway no sign of him in the immediate vicinity and then I had to go to work. Any idea how far he could have crawled before expiring?